Most often when using fenspirid, there are undesirable reactions from the gastrointestinal tract.
The undesirable reactions presented below are listed in accordance with the damage to organs and organ systems. The frequency of occurrence of undesirable reactions is estimated as follows: arising "very often" -> 1/10; "often" -> 1/100 and <1/10, "infrequently" -> 1/1000 and <1/100, "rarely" -> 1/10000 and <1/1000, "very rarely" - <1 / 10000, including individual messages, "frequency unknown" - according to available data, it was not possible to establish the frequency of occurrence.
Disturbances from the nervous system: rarely - drowsiness; frequency unknown - dizziness.
Heart Disease: rarely - moderate tachycardia, the severity of which decreases with a decrease in the dose of fenspiride; frequency unknown - a palpitation, a decrease in blood pressure, possibly associated with tachycardia.
Disorders from the gastrointestinal tract: often - gastrointestinal disorders, nausea, epigastric pain; frequency unknown - diarrhea, vomiting.
Disturbances from the skin and subcutaneous tissues: rarely - erythema, rash, hives, angioedema, fixed erythema pigmentosa; frequency unknown - pruritus, toxic epidermal necrolysis, Stevens-Johnson syndrome.
General disorders and disorders at the site of administration: frequency unknown - asthenia, increased fatigue.
If any of the unwanted reactions listed in the manual is aggravated, or if you notice any other undesirable reactions not listed in the instructions, inform the doctor about it.